. Power Heater machine rotary joint, long-term service in the temperature of 600 ℃, pressure 4.0Mpa working conditions; 2. ball seal structure, rotatable about an axis 360 ° and also can swing ± 15 ° angle; 3. The unique multi- spring compensation mechanism, which automatically compensates for wear; 4. by the SMS Siemag special material spherical seals, anti-vibration, thermal shock; 5. Simple structure, easy maintenance